Abstract: Web signifies its influence in the evolution of data warehouses with two aspects: Web-enabled and Web-based, each addressing a purpose and a level of system complexity. In this paper an architectural template of data warehouse is reviewed. A five-level architecture of Web-enabled data warehouse is analyzed to identify its characteristics. Web-based data warehouse, for the first time, is termed to reflect the new trends. Clickstream data warehouse, as a specific Web-based data warehouse, is studied with a focus on its infrastructure. This paper highlights the roles both Web-related data warehouse can play, and comparison is also made between them.

Key words: Data Warehouse, Data Mart, Web-enabled Data Warehouse, Web-based Data Warehouse